// // 1.引入http模块
const http = require('http');

const server = http.createServer((req, res) => {



  res.end(`<!DOCTYPE html>
            <html lang="en">
            <head>
              <meta charset="UTF-8">
              <meta name="viewport" content="width=device-width, initial-scale=1.0">
              <title>Document</title>
              <style>
              td {
                padding: 20px 40px;
              }
              table tr:nth-child(odd) {
                background-color: #aef;
              }
              table tr:nth-child(event) {
                background-color: #fcb;
              }
              table, td {
                border-collapse: collapse;
              }
              </style>
            </head>
            <body>
              <table border="1">
                <tr><td></td><td></td><td></td></tr>
                <tr><td></td><td></td><td></td></tr>
                <tr><td></td><td></td><td></td></tr>
                <tr><td></td><td></td><td></td></tr>
              </table>
              <script>
              let tds = document.querySelectorAll('td');
              console.log(tds);
              tds.forEach(e => {
                e.onclick = function() {
                  this.style.background ='red';
                }
              });
              </script>
            </body>
            </html>`)
});

server.listen(9000, () => {
  console.log('服务器启动成功');
});